org.apache.sysds.runtime.compress.estim.sample

## Class SmoothedJackknifeEstimator

- java.lang.Object
- - org.apache.sysds.runtime.compress.estim.sample.SmoothedJackknifeEstimator

-     public class SmoothedJackknifeEstimator
      extends Object

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `SmoothedJackknifeEstimator()`

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static int` | `distinctCount(int numVals, int[] freqCounts, int nRows, int sampleSize)` Peter J.

    - ### Methods inherited from class java.lang.Object

      `equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### SmoothedJackknifeEstimator

          public SmoothedJackknifeEstimator()

  - ### Method Detail

    - #### distinctCount

          public static int distinctCount(int numVals,
                                          int[] freqCounts,
                                          int nRows,
                                          int sampleSize)

      Peter J. Haas, Jeffrey F. Naughton, S. Seshadri, and Lynne Stokes. Sampling-Based Estimation of the Number of Distinct Values of an Attribute. VLDB'95, Section 4.3.
      Parameters:
        `numVals` - The number of unique values in the sample
        `freqCounts` - The inverse histogram of frequencies. counts extracted
        `nRows` - The original number of rows in the entire input
        `sampleSize` - The number of rows in the sample
      Returns:
        Estimate of the number of distinct values

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